Re: Patch: Write Amplification Reduction Method (WARM)

From: Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>
To: Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com>
Cc: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Patch: Write Amplification Reduction Method (WARM)
Date: 2016-12-02 03:04:44
Message-ID: CAJrrPGfnv1hjOxcf4UB7-7eBdM=ppfxzxmVzhjfBCZ+4LozwfA@mail.gmail.com
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On Tue, Nov 15, 2016 at 5:58 PM, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>
wrote:

>
>
> On Sat, Nov 12, 2016 at 10:12 PM, Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com
> > wrote:
>
>>
>>
>> On Tue, Nov 8, 2016 at 9:13 AM, Haribabu Kommi <kommi(dot)haribabu(at)gmail(dot)com>
>> wrote:
>>
>>>
>>> Thanks for the patch. This shows a very good performance improvement.
>>>
>>>
>> Thank you. Can you please share the benchmark you ran, results and
>> observations?
>>
>
> I just ran a performance test on my laptop with minimal configuration, it
> didn't show much
> improvement, currently I don't have access to a big machine to test the
> performance.
>
>
>
>> I started reviewing the patch, during this process and I ran the
>>> regression
>>> test on the WARM patch. I observed a failure in create_index test.
>>> This may be a bug in code or expected that needs to be corrected.
>>>
>>
>> Can you please share the diff? I ran regression after applying patch on
>> the current master and did not find any change? Does it happen consistently?
>>
>
>
> Yes, it is happening consistently. I ran the make installcheck. Attached
> the regression.diffs file with the failed test.
> I applied the previous warm patch on this commit
> - e3e66d8a9813d22c2aa027d8f373a96d4d4c1b15
>

Are you able to reproduce the issue?

Currently the patch is moved to next CF with "needs review" state.

Regards,
Hari Babu
Fujitsu Australia

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